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公开(公告)号：US11713502B2
公开(公告)日：2023-08-01
申请号：US16609408
申请日：2018-05-07
申请人： ArcelorMittal
IPC分类号： C23C2/06 , C23C2/40 , C21D8/02 , C21D9/46 , B23K11/11 , B23K11/16 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12
CPC分类号： C23C2/06 , B23K11/11 , B23K11/166 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0273 , C21D9/46 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C23C2/40 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008
摘要： A method for producing a high-strength steel sheet having high ductility, formability and weldability includes providing a cold-rolled sheet, with a composition containing: 0.15% ≤C≤0.23%, 1.4% ≤Mn≤2.6%, 0.6% ≤Si≤1.3%, with C+Si/10≤0.30%, 0.4% ≤Al≤1.0%, with Al≥6(C+Mn/10)−2.5%, 0.010% ≤Nb≤0.035%, 0.1% ≤Mo≤0.5%, annealing the sheet at 860° C.-900° C. to obtain a structure consisting of at least 90% austenite and at least 2% intercritical ferrite, quenching to a temperature between Ms-10° C. and Ms-60° C. at a rate Vc higher than 30° C./s, heating to a temperature PT between 410° C. and 470° C. for 60 s to 130 s, hot-dip coating the sheet, and cooling to room temperature. The microstructure includes 45% to 68% of martensite, consisting of 85% to 95% partitioned martensite having a C content of at most 0.45%, and fresh martensite; 10% to 15% retained austenite; 2% to 10% intercritical ferrite; 20% to 30% lower bainite.
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公开(公告)号：US11680331B2
公开(公告)日：2023-06-20
申请号：US16754011
申请日：2018-10-19
申请人： ArcelorMittal
发明人： Anirban Chakraborty , Pascal Bertho , Hassan Ghassemi-Armaki , Christian Allely , Tiago Machado Amorim
IPC分类号： C25D3/22 , B32B15/01 , B32B7/05 , B23K11/11 , C21D6/00 , C21D9/46 , C22C18/00 , C22C38/02 , C22C38/06 , C22C38/22 , C22C38/38 , C23F17/00
CPC分类号： C25D3/22 , B23K11/11 , B32B7/05 , B32B15/012 , C21D6/002 , C21D6/005 , C21D6/008 , C21D9/46 , C22C18/00 , C22C38/02 , C22C38/06 , C22C38/22 , C22C38/38 , C23F17/00 , B32B2250/02 , B32B2605/08 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008
摘要： A steel sheet coated with a coating comprising from 10 to 40% of nickel, the balance being zinc, such steel sheet having a microstructure comprising from 1 to 50% of residual austenite, from 1 to 60% of martensite and optionally at least one element chosen from: bainite, ferrite, cementite and pearlite, and the following chemical composition in weight: 0.10
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3.发明授权公开(公告)号：US12091724B2
公开(公告)日：2024-09-17
申请号：US18094503
申请日：2023-01-09
申请人： ArcelorMittal
IPC分类号： C21D9/46 , B23K11/11 , C21D8/02 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/32 , C23C2/02 , C23C2/06 , C23C2/28 , C23C2/40 , C23C28/02 , B23K103/04 , B23K103/20
CPC分类号： C21D9/46 , B23K11/11 , C21D8/0273 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/32 , C23C2/02 , C23C2/022 , C23C2/0224 , C23C2/06 , C23C2/28 , C23C2/40 , C23C28/025 , C23C28/027 , B23K2103/04 , B23K2103/20 , C21D2211/001 , C21D2211/002 , C21D2211/003 , C21D2211/005 , C21D2211/008 , C21D2211/009
摘要： Galvannealed steel sheet having a steel substrate coated with a first alloy layer with iron and nickel directly topped by a second alloy layer based on zinc, the first and second alloyed layers being alloyed through diffusion such that the second alloy layer includes from 5 to 15 wt. % of iron, from 0 to 15 wt. % of nickel, a balance being zinc.
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4.发明公开公开(公告)号：US20230241865A1
公开(公告)日：2023-08-03
申请号：US18131622
申请日：2023-04-06
申请人： ArcelorMittal
IPC分类号： B32B15/01 , B23K11/11 , C21D8/02 , C21D9/46 , C22C38/02 , C22C38/04 , C22C38/06 , C23C10/28 , C25D3/12 , C25D3/22 , C25D5/12 , C25D5/50
CPC分类号： B32B15/011 , B23K11/11 , C21D8/0273 , C21D9/46 , C22C38/02 , C22C38/04 , C22C38/06 , C23C10/28 , C25D3/12 , C25D3/22 , C25D5/12 , C25D5/50
摘要： The present invention relates to a method for the manufacture of a galvannealed steel sheet including the steps of A.) coating of the steel sheet with a first coating consisting of nickel and having a thickness between 150 nm and 650 nm, the steel sheet having the following composition in weight percentage 0.10
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公开(公告)号：US11578378B2
公开(公告)日：2023-02-14
申请号：US16754589
申请日：2018-10-19
申请人： ArcelorMittal
IPC分类号： C21D9/46 , B23K11/11 , C21D8/02 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/32 , C23C2/06 , C23C2/28 , C23C2/40 , C23C28/02 , B23K103/20 , B23K103/04
摘要： Method for the manufacture of a galvannealed steel sheet includes the following steps: A) the provision of a pre-coated steel sheet coated with a first coating comprising iron and nickel, such steel sheet having the following chemical composition in weight percent 0.10
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公开(公告)号：US12054802B2
公开(公告)日：2024-08-06
申请号：US18195578
申请日：2023-05-10
申请人： ArcelorMittal
发明人： Jean-Marc Pipard , Sebastien Cremel , Anirban Chakraborty , Damon Panahi , Olga Girina , Hassan Ghassemi-Armaki , Pavan Challa Venkata Surya , Yacine Benlatreche
IPC分类号： C21D9/50 , B23K11/11 , B23K11/16 , B23K31/12 , B23K37/04 , C21D1/76 , C21D6/00 , C21D8/02 , C21D9/46 , C22C38/02 , C22C38/06 , C22C38/22 , C22C38/38 , C23C2/02 , C23C2/26 , C23C2/40 , C23F17/00 , C25D5/36 , B23K101/00 , B23K103/04 , C23C2/06 , C25D3/22
CPC分类号： C21D9/50 , B23K11/115 , B23K11/163 , B23K31/125 , B23K37/0408 , C21D1/76 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0236 , C21D8/0247 , C21D9/46 , C22C38/02 , C22C38/06 , C22C38/22 , C22C38/38 , C23C2/02 , C23C2/0222 , C23C2/0224 , C23C2/024 , C23C2/26 , C23C2/40 , C23F17/00 , C25D5/36 , B23K2101/006 , B23K2103/04 , C21D2211/001 , C21D2211/008 , C23C2/06 , C25D3/22
摘要： A method for producing a zinc or zinc-alloy coated steel sheet with a tensile strength higher than 900 MPa, for the fabrication of resistance spot welds containing in average not more than two Liquid Metal Embrittlement cracks per weld having a depth of 100 μm or more, with steps of providing a cold-rolled steel sheet, heating cold-rolled steel sheet up to a temperature T1 between 550° C. and Ac1+50° C. in a furnace zone with an atmosphere (A1) containing from 2 to 15% hydrogen by volume, so that the iron is not oxidized, then adding in the furnace atmosphere, water steam or oxygen with an injection flow rate Q higher than (0.07%/h×α), α being equal to 1 if said element is water steam or equal to 0.52 if said element is oxygen, at a temperature T≥T1, so to obtain an atmosphere (A2) with a dew point DP2 between −15° C. and the temperature Te of the iron/iron oxide equilibrium dew point, then heating the sheet from temperature T1 up to a temperature T2 between 720° C. and 1000° C. in a furnace zone under an atmosphere (A2) of nitrogen containing from 2 to 15% hydrogen and more than 0.1% CO by volume, with an oxygen partial pressure higher than 10−21 atm., wherein the duration to of heating of the sheet from temperature T1 up to the end of soaking at temperature T2 is between 100 and 500 s, soaking the sheet at T2, then cooling the sheet at a rate between 10 and 400° C./s, then coating the sheet with zinc or zinc-alloy coating.
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公开(公告)号：US11466354B2
公开(公告)日：2022-10-11
申请号：US16753739
申请日：2018-10-19
申请人： ArcelorMittal
IPC分类号： C23C2/02 , B32B15/01 , C21D6/00 , C21D9/46 , C22C19/03 , C22C38/06 , C22C38/22 , C22C38/34 , C22C38/38 , C23C2/06 , C23C2/40 , C23C28/02
摘要： Method for the manufacture of a coated steel sheet including the following step of A) the provision of a pre-coated steel sheet coating with a first coating including iron and nickel, B) the thermal treatment of such pre-coated steel sheet at a temperature between 600 and 1000° C., and C) the coating of the steel sheet obtained in step B) with a second coating based on zinc.
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8.发明授权公开(公告)号：US11654653B2
公开(公告)日：2023-05-23
申请号：US16605473
申请日：2018-04-25
申请人： ArcelorMittal
IPC分类号： C25D5/12 , B23K11/11 , C22C38/02 , C22C38/04 , C25D5/50 , C21D8/02 , C23C10/28 , C25D3/12 , C21D9/46 , C25D3/22 , C22C38/06 , B32B15/01
CPC分类号： B32B15/011 , B23K11/11 , C21D8/0273 , C21D9/46 , C22C38/02 , C22C38/04 , C22C38/06 , C23C10/28 , C25D3/12 , C25D3/22 , C25D5/12 , C25D5/50
摘要： The present invention relates to a method for the manufacture of a galvannealed steel sheet including the steps of A.) coating of the steel sheet with a first coating consisting of nickel and having a thickness between 150 nm and 650 nm, the steel sheet having the following composition in weight percentage 0.10
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公开(公告)号：US11649522B2
公开(公告)日：2023-05-16
申请号：US16614734
申请日：2018-06-13
申请人： ArcelorMittal
发明人： Jean-Marc Pipard , Sebastien Cremel , Anirban Chakraborty , Damon Panahi , Olga Girina , Hassan Ghassemi-Armaki , Pavan Challa Venkata Surya , Yacine Benlatreche
IPC分类号： C21D9/50 , C21D8/02 , C21D6/00 , C22C38/38 , C22C38/22 , C22C38/06 , C22C38/02 , C21D9/46 , C21D1/76 , C23C2/02 , C23C2/40 , C25D5/36 , C23F17/00 , B23K11/11 , B23K31/12 , B23K11/16 , B23K37/04 , B23K103/04 , B23K101/00 , C23C2/06 , C25D3/22
CPC分类号： C21D9/50 , B23K11/115 , B23K11/163 , B23K31/125 , B23K37/0408 , C21D1/76 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0236 , C21D8/0247 , C21D9/46 , C22C38/02 , C22C38/06 , C22C38/22 , C22C38/38 , C23C2/02 , C23C2/40 , C23F17/00 , C25D5/36 , B23K2101/006 , B23K2103/04 , C21D2211/001 , C21D2211/008 , C23C2/06 , C25D3/22
摘要： A method for producing a zinc or zinc-alloy coated steel sheet with a tensile strength higher than 900 MPa, for the fabrication of resistance spot welds containing in average not more than two Liquid Metal Embrittlement cracks per weld having a depth of 100 μm or more, with steps of providing a cold-rolled steel sheet, heating cold-rolled steel sheet up to a temperature T1 between 550° C. and Ac1+50° C. in a furnace zone with an atmosphere (A1) containing from 2 to 15% hydrogen by volume, so that the iron is not oxidized, then adding in the furnace atmosphere, water steam or oxygen with an injection flow rate Q higher than (0.07%/h×α), α being equal to 1 if said element is water steam or equal to 0.52 if said element is oxygen, at a temperature T≥T1, so to obtain an atmosphere (A2) with a dew point DP2 between −15° C. and the temperature Te of the iron/iron oxide equilibrium dew point, then heating the sheet from temperature T1 up to a temperature T2 between 720° C. and 1000° C. in a furnace zone under an atmosphere (A2) of nitrogen containing from 2 to 15% hydrogen and more than 0.1% CO by volume, with an oxygen partial pressure higher than 10−21 atm., wherein the duration tD of heating of the sheet from temperature T1 up to the end of soaking at temperature T2 is between 100 and 500 s., soaking the sheet at T2, then cooling the sheet at a rate between 10 and 400° C./s, then coating the sheet with zinc or zinc-alloy coating.
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10.发明授权公开(公告)号：US11566310B2
公开(公告)日：2023-01-31
申请号：US16759253
申请日：2018-11-15
申请人： ARCELORMITTAL
IPC分类号： C22C38/58 , C21D1/76 , C21D9/46 , C21D9/56 , C22C38/02 , C22C38/06 , C22C38/44 , C22C38/48 , C22C38/50 , C22C38/54 , C23C2/06 , B23K103/04 , B23K11/11 , B23K35/02 , B23K35/28 , B23K35/30
摘要： The present invention relates to a method for the manufacture of a coated steel sheet comprising the following successive steps: A. the coating of the steel sheet with a first coating consisting of nickel and having a thickness between 600 nm and 1400 nm, the steel sheet having the following composition in weight: 0.10
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